Spiral pull jack



liatenled llera i571, lilith tesa finemente oeAnNLo-r Onestat-nnMnsoeorresnrrs- Application `tiled 'February 14, i927.

'-'nvonti in reh'drs to a jiafcltparticular- Aned ifor the purpose otreineving` ds, piper` or t like which they u sie lodggjed or cned in thewel] .a isodlhat it ner'fessary to exert n eonsiderable orco either withor without a twi l ing,4 inotion for the `proposeet removing the saine.rlheinv tion coversva siinple and `ediei'ent construe n which may :beneed dzo remove 1W either a rod Aor al hollow pipe hv either a fdireetlitti V neovenient for-a lifting sinove- Anient 'conihined with atwisting; finovement, fDetailedobjects 'of theiinvention will .beep- 1e'ent troni the `tollowin'gidetailed descripta tion Tand the appendedclaims.

In the drawings:

Figure 1 .is `Iaperspeetiae viewot' fthe device in operative positiontor removing a drill. i

Fipnire Q, is a itop iplan view ot the .saine with thedrill iin section.

Figure ll is a vertieal `sectional `view 'through the jack.

The Adevice ieoniprises a fbase member `l `which preferably oftrnsto-eonieal torni and is provided at one side with a handle@ `and atthe opposite side `with `hole 3 through which may he Lpassed la( rod 4by means of which the base may be held against tanning inoveinent itnecessary. The bese is hollow and at its upper end has an internalcylindrical portion which is serew threaded as indicated at 5. lWiththese screw threads engage erternal screw threads 6 on i a hollow screwmember 7 which is provided with a head 8 ot larger diameter. The lowerend of the screw 7 is provided with an eX- ternal flange 9 torlned b v awasher which is removably fastened tothe screw 7 in any desired rnanner.rl`his is designed to Contact with shoulders l() on the inside ot thebase and limit the upward movement of the screw. Located between theupper end of the base l and the head 8 ot the screw 7 is a bushif ine,ror washer l1 provided with a plurality of lugs 12 which lit intocorresponding openings in the. top of the hase l and prevent rotarymovement ot the bushing. The inside ol this bushing is screw threaded toengi/'aire the screw thread 6. The screw threads in the base may beomitted.

A ehnclt ineinher 13 having eorrugations on its inner tace inonnted inthe head 8 and held in position hy a rod 14: passing; through the headand .said chuck ineniher. The cor migrated portion all the ol h'ineniher pra lill Fill

traded A cooperating chori; n'leinber 15 is i y moimted inthe `oppositeside ol" the A and has similar cori, ations on `its 1Vdiner tane.Mtl-shaped yoke inei'nher ltlhas `hoth dem: pass-finir lthrongli.thehead 8 andentheir enter ends `lov nuts 1 7. An adju-stintr screw lllscrew threaded .through the volte and bearsat its inner end against the`clinch ineniher In this rnanner the clni'cle inenrher may 'be p ntionedas desired at first1byadjnstinent of `the yoke 16'l through :the'serew17 land iinallysbjv nieansott'heiadj listing; screw 18.

The head 8 isprovided atits s'itleswvith ears lll which have opei'ringstherethrough to receive asi-od EEO `'hjv means off whichthe head may 'beturned. di loose collarll overllios the head 8 and is heldin position bya head `on the ripper `end of the screw 7 whieh may he convenientlytermed by pressing outi'rardly the metal to engage la slight flange ionthe `lower part ofthe collar: Ball bearings `inay be interposed `betweenthe collar 2l :and the head in. order to permit tree relative movement`between these two parts.

T it is `desiretl to `nso the ja'eh to remove ll il "or similar lool,`the jack is passed ove. ne upper ond olf the drill aintil the haserests upon the fe'ronnd or a suitable support as shown in Figure l. Themovable ehncl'; lli is then 'torced into engagement with the drill sothat the latter is clamped between the two chucks. The rod is insortedinto one oit the hollow ears 'i9 and the head 8 is turned thereby. Thisturning movement, of Course, imparts a turning inovenient to the drillwhich is clamped to the head and at the saine time the engagement oitthe screw thread t5 of the screw 7 with the screw threads 5 ot the hasewill cause the screw 7 and drill to nieve upwardlv It found neeessargYthe hase inay be held in position hy means ot the rod l and handle 2.

It it is desired to give a direct pull without any turning movement, theclinch l5 is loosened so that the ohnelis do not engage the drillnienihen el wrench B is clamped to the drill stein A inst above thecollar 2l and. held to prevent any rotation of the drill no The head isthen turned by means ot the rod QU as ln'eviouslv, and this turning'movement 'will impart a longitudinal nieveo; nt. to the seres-f 'l' andthe head ti het will ie/ts filigghtlv into the central einanintifol theY vor pipe. It lis also apparent 'that merely a longitudinal movementmay be imparted to the drill orvpipe or a combined longitudinal andtwisting movement may be obtained by a simple 'adjustment of themechanism.

vThe precise formand 4proportions of the various parts maybe widelyvaried and details of construction may be changed with- Voutinany waydeparting fromv the spirit of i the invention, which is to be regardedas limitedonlyby the scope of the appended claims.

claim as my invention:

g1. A jackcomprising a hollow vbase member, a' hollow screw memberscrew-threaded in said'base and having a head, and relative- `lyadjustableV chuck jaws carried by said head within the same and inposition to engage an article passing through the hollow screw member.

2." A jack comprising a hollow base member,- a hollow screw memberscrew-threaded in said basev and having a head, a chuck 7V" ymemberrigidly held in said head, a cooperating chuck member adjustably mountedin said head, and means for adjusting the latter Chuck member to clampan varticle passing through the hollow head between the chucks.

3. A jack comprising a hollow base ineinber, a hollow screw memberscrew-thrcadcd in said base and having a head, a chuck member rigidlyheld in said head` a cooperating chuck member adjustably mounted in saidhead, means for adjusting the latter chuck member to clamp on articlepassingr through the hollow head between the chucks, and means forturning said head to both rotate said article and move itlongitudinally.

4. A jack comprising a hollow base member, a hollow screw memberscrew-threaded in said base and having a head, relatively adjustablechuck jaws carried by said head in position to engage an article passingthrough the hollow screw member, a collar rotatably mounted on said headand means for turning said head.

5. A jack comprising a hollow base member, a hollow screw memberscrew-threaded in said base and having a head, relatively adjustablechuck jaws carried by said head within the same and in position toengage an article passing through the hollow screw member, screw meansfor adjusting one of said chuck members, and means for turning the head.

6. A jack comprising a hollow base 1neinber, a hollow internallyscrew-threaded bushing held against rotation on said base, a hollowscrew member screw threaded into said bushing and having a head,relatively adjustable chuck jaws carried by said head within the same,and means for turning said head.

In testimony whereof, I have hereunto subscribed my name.

GABRIELLO OSANNI.

